Laminate Flooring on Two Different Concrete Heights
#1
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Join Date: Aug 2010
Location: Canada
Posts: 3
Laminate Flooring on Two Different Concrete Heights
I am planning to install laminate flooring in a room the main level of a concrete slab. After peeling off the original carpet, there appears to be a few inches of uneven concrete that runs along the drywall covering the exterior walls (but not the interior walls).

There is around an inch or two of blue polystyrene with a plastic moisture barrier between the "outer" concrete and "inner" concrete. The "inner" concrete appears to have been levelled (1/8-inch maximum imperfections), but approximately 1/2 inch lower than the "outer" concrete.
What should I do to raise the "inner" concrete floor to achieve a constant level throughout the room? Would I need to use levelling compound on the few inches of "outer" concrete?
Unrelated to the topic of flooring: Is the protruding "outer" concrete part of the concrete slab foundation?
Thank you in advance!

There is around an inch or two of blue polystyrene with a plastic moisture barrier between the "outer" concrete and "inner" concrete. The "inner" concrete appears to have been levelled (1/8-inch maximum imperfections), but approximately 1/2 inch lower than the "outer" concrete.
What should I do to raise the "inner" concrete floor to achieve a constant level throughout the room? Would I need to use levelling compound on the few inches of "outer" concrete?
Unrelated to the topic of flooring: Is the protruding "outer" concrete part of the concrete slab foundation?
Thank you in advance!
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#2
I'm not sure how they do things in Vancouver, but it looks as if the outer "rim" is made of concrete block, and the center was poured later, not very well, I might add. You must level the floor in order to install any laminate, but how many square feet are you talking about? Is the main floor lower than the strip?
#3
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Join Date: Aug 2010
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Posts: 3
I plan to lay laminate flooring in just one room, so around 100 square feet. The main floor is approximately 1/2 inch lower than the strip. Would using 1/2 inch extruded polystyrene be okay to raise the "inner" level?
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